https://doi.org/10.1140/epjc/s10052-017-4775-z
Regular Article - Theoretical Physics
Generalized parton distributions: confining potential effects within AdS/QCD
1
Institut de Physique Théorique, Université Paris Saclay, CEA, 91191, Gif-sur-Yvette, France
2
INFN-TIFPA Dipartimento di Fisica, Università degli Studi di Trento, Via Sommarive 14, Povo, 38123, Trento, Italy
* e-mail: marcoclaudio.traini@unitn.it
Received:
17
February
2017
Accepted:
19
March
2017
Published online:
17
April
2017
Generalized parton distributions are investigated within a holographic approach where the string modes in the fifth dimension describe the nucleon in a bottom–up or AdS/QCD framework. The aim is to bring the AdS/QCD results in the realm of phenomenology in order to extract consequences and previsions. Two main aspects are studied: (i) the role of the confining potential needed for breaking conformal invariance and introducing confinement (both: classic soft-wall and recent infra-red potentials are investigated); (ii) the extension of the predicted GPDs to the entire range of off-forward kinematics by means of double distributions. Higher Fock states are included describing the nucleon as a superposition of three valence quarks and quark–antiquark pairs and gluons.
© The Author(s), 2017
